(And before you think I’m theologically naive, make sure you read my comments that follow the quotation)
The following excerpts come from the lips of Pope Ratzinger himself, spoken Nov. 19th 2008.
On the journey we have undertaken under the guidance of St. Paul, we now wish to reflect on a topic that is at the center of the controversies of the century of the Reformation: the issue of justification.
To be just means simply to be with Christ and in Christ. And this suffices. Other observances are no longer necessary.
That is why Luther’s expression “sola fide” is true if faith is not opposed to charity, to love. Faith is to look at Christ, to entrust oneself to Christ, to be united to Christ, to be conformed to Christ, to his life. And the form, the life of Christ, is love; hence, to believe is to be conformed to Christ and to enter into his love. That is why, in the Letter to the Galatians, St. Paul develops above all his doctrine on justification; he speaks of faith that operates through charity (cf. Galatians 5:14).
Paul knows that in the double love of God and neighbor the whole law is fulfilled. Thus the whole law is observed in communion with Christ, in faith that creates charity. We are just when we enter into communion with Christ, who is love. We will see the same in next Sunday’s Gospel for the solemnity of Christ the King. It is the Gospel of the judge whose sole criterion is love. What I ask is only this: Did you visit me when I was sick? When I was in prison? Did you feed me when I was hungry, clothe me when I was naked? So justice is decided in charity. Thus, at the end of this Gospel, we can say: love alone, charity alone. However, there is no contradiction between this Gospel and St. Paul. It is the same vision, the one according to which communion with Christ, faith in Christ, creates charity. And charity is the realization of communion with Christ. Thus, being united to him we are just, and in no other way.
Paul’s experience of the Risen Lord on the road to Damascus led him to see that it is only by faith in Christ, and not by any merit of our own, that we are made righteous before God. Our justification in Christ is thus God’s gracious gift, revealed in the mystery of the Cross. Christ died in order to become our wisdom, righteousness, sanctification and redemption (cf. 1 Cor 1:30), and we in turn, justified by faith, have become in him the very righteousness of God (cf. 2 Cor 5:21). In the light of the Cross and its gifts of reconciliation and new life in the Spirit, Paul rejected a righteousness based on the Law and its works.
Actually, in droves Catholics have come around to basically granting a doctrine of justification by faith.
If your reaction is, “Yeah … but they don’t mean by faith alone,” you probably have been too influenced by uninformed Protestant rhetoric and haven’t been following the ecumenical discussion carefully enough. If you say, “Yeah but when Catholics affirm justification by faith alone or by grace alone, they don’t mean the same thing the Reformers did,” well … The Reformers themselves didn’t mean the same thing by “justification by faith alone.”
There is no single doctrine of justification in the Reformation.
To this very day Protestants understand the doctrine differently (nothwithstanding much overlap between their views, and between their views and Catholic views). Thus, Martin Luther taught a sola fide, Calvin taught a sola fide, and Catholics also teach a sola fide, yet each are different in significant ways I do not have time to fully develop here. They all have one thing in common: they all affirm that justifying righteousness originates outside of us in God himself (extra nos) and justifies us by grace alone (sola gratia), and the faith by which we are justified is a free gift of God—-notwithstanding the fact that all language of “free gift” and “sola gratia” are going to be understood differently by Arminians and Calvinists/Augustinians. (It is the latter point of difference that caused a great deal of the tension between Luther and the Catholic Church).
If you still think I’m theologically naive, leave comments in the thread. It may be because I can’t say everything in one post.